Good question - we actually did a benchmark recently and even with maps/search grounding it is pretty suboptimal from a end user's perspective https://news.ycombinator.com/item?id=47366423 For instance, we found this: "The pattern extends to navigation: Gemini’s own Maps grounding makes it worse at giving directions"

Second, Google Maps API has pretty strict licensing terms - you have to delete data within 30 days, have to attribute it properly. There are reasons why OpenAI and other companies are not using their APIs